The sweet peppers in greenhouses often encounter cloudy snow and cold weather during the flowering period, which results in severe sheds and fruit drop, affecting yield and income. Here are some ways to increase the fruit setting rate of greenhouse sweet peppers: 1. Improve the lighting conditions and increase the temperature When you encounter cold snow and cold weather, you can add additional lights in the shed, and at the same time hang a light curtain on the back wall to increase lighting in the shed. Clean the film and improve the light transmittance of the film. Strengthen pruning and management of pruning, remove excessive foliage, reduce nutrient consumption, and thus increase fruit setting rate. 2. Reduce greenhouse humidity, insect pollination Bell pepper in the pollination period of the humidity is more demanding, encounter low temperature even cloudy, shed indoor humidity is too large, easily lead to sweet pepper pollen development, decreased activity, can not be completed normally pollination . Before and after noon, according to the weather conditions, you can let the air cool and dehumidify and reduce the humidity in the shed as much as possible. 3. Spraying microelement fertilizer and plant regulator Boron is one of the essential elements of flower bud differentiation of sweet pepper. Boron deficiency often leads to poor flower bud development. For this reason, boron-containing liquid fertilizer is sprayed before flowering, which can supplement the nutrition of the plant and reduce it. Falling flowers and falling fruit. Spraying 30 ~ 40 mg / kg of naphthalene acetic acid solution can also play a very good role in the preservation of fruit.
The virus is composed of a nucleic acid molecule (DNA or RNA) with a protein consisting of non-cell morphology of the campal life of the living body. The general symptoms of viral infection are fever, headache, cough and other symptoms of systemic poisoning and viral host and invasion of tissues and organs leading to inflammatory symptoms caused by local symptoms (diarrhea, rash, liver function damage, etc.). Different symptoms of the different virus, some viruses can also damage the myocardium, causing viral myocarditis. There are two types of viral infections, mostly recessive infections (subclinical infections), and a few are dominant infections. Dominant infection can be divided into acute infection and persistent infection. There are many ways of antiviral infection, such as direct inhibition or killing of viruses, interference with virus adsorption, prevent viruses from penetrating cells, inhibit viral biosynthesis, inhibit viral release or enhance host antivirus capabilities. At present, there are several major types of antiviral drugs: Anti-Respiratory virus infection drugs, anti-immune virus drugs, anti-hepatitis virus drugs, anti-herpes virus drugs.
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